1.4.0 Release:
* Fix #72: Publishing to an exchange with an empty name is valid and should not throw an exception (lstrojny)
* Fix #77: AMQPQueue::delete() now no longer returns a boolean, but an integer of how many messages were deleted. WARNING: this can potentially break BC (Bogdan Padalko)
* Fix #75: adhering to the AMQP spec by closing channel and sometimes even the connection in case of certain errors (Bogdan Padalko)
* Fix #81: Add optional arguments parameter to bind()/unbind() (Michael Squires)

For a complete list of changes see:
https://github.com/pdezwart/php-amqp/compare/v1.3.0...v1.4.0beta1